Then they can be further recrystallized to biphenyl with a purity of over 99.9 %.进一步用溶剂结晶法去除了联苯中的杂质,获得99.9%以上联苯.Methods A new synthesis route for felbinac preparation was studied with biphenyl under ultrasound.方法:以联苯为原料,...
在这些裙子下面, 则是另外穿上一件及踝的灯笼裤.Beneath it all, wide - legged pants gathered at the ankles are worn.那高个子老是穿着一条长不及踝的裤子.The boy is so untidy - he always has his socks hanging half mast.他穿着正式的长及足踝的长袍.He was vested in an ankle - len...